公开(公告)号：US10687313B2

公开(公告)日：2020-06-16

申请号：US15989902

申请日：2018-05-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiayin Zhang ,  Liqing Zhang

IPC: H04W72/04 ,  H04W72/12 ,  H04W72/14 ,  H04W72/08 ,  H04W74/08

Abstract: Methods and devices for grant-based uplink transmission in an unlicensed band are provided. Uplink grant messages are transmitted to electronic devices (EDs) in order to indicate time-frequency resources that are allocated to the EDs for uplink transmission in an unlicensed spectrum band. For a given ED, in the event that a first listen-before-talk (LBT) operation for the time-frequency resource allocated to the ED fails, the ED performs a second LBT operation within the allocated time-frequency resource at a start time based on a start point configuration within the allocated time-frequency resource. If the second LBT operation succeeds, the ED transmits an uplink transmission within a remaining portion of the allocated time-frequency resource that includes an activation signal to indicate a start of the uplink transmission, and uplink payload data.

公开(公告)号：US20200076564A1

公开(公告)日：2020-03-05

申请号：US16678406

申请日：2019-11-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Hao Tang ,  Xinxian Li ,  Zhenfei Tang

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26

Abstract: A method, system, and device to obtain a basic subcarrier spacing, or a channel bandwidth, or a maximum transmission bandwidth, or a usable subcarrier spacing set via a predefined mapping rule is provided. In an embodiment, a method in a network component to determine a system numerology includes determining, by the network component, one or more subcarrier spacing options from a candidate subcarrier spacing set that is associated with a carrier frequency band. The method also includes transmitting, by the network component, a signal indicating to one or more UEs one or more subcarrier spacing options from the candidate subcarrier spacing set.

公开(公告)号：US20200029292A1

公开(公告)日：2020-01-23

申请号：US16415910

申请日：2019-05-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jialin Zou ,  Yongxia Lyu ,  Hua Xu ,  Liqing Zhang ,  Jianglei Ma

IPC: H04W56/00 ,  H04W76/27 ,  H04W36/00 ,  H04L1/00 ,  H04W24/10 ,  H04W36/30 ,  H04W72/04 ,  H04W76/11 ,  H04B7/06

Abstract: In accordance to embodiments, a user equipment (UE) may receive, from the source base station, a beam information message comprising beam associated information. The beam associated information may indicate a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station and a plurality of default timing advance (TA)s. Each default TA of the plurality of TAs is associated with one beam of the plurality of beams in the target base station and additional related configurations.

公开(公告)号：US20200015260A1

公开(公告)日：2020-01-09

申请号：US16557060

申请日：2019-08-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yan Chen ,  Yi Wang ,  Yinggang Du ,  Xiuqiang Xu ,  Liqing Zhang

IPC: H04W72/12 ,  H04W76/27 ,  H04W72/04

Abstract: Methods and systems for dynamically activate and deactivate an allocated resource for a UE to make grant-free uplink transmission are provided. In one embodiment, a user equipment (UE) receives a Radio Resource Control (RRC) signal. The RRC signal specifies grant-free (GF) configuration information. The GF configuration information comprises an activation field and at least one other GF resource configuration field. The activation field indicates whether the UE may perform GF uplink (UL) transmissions without waiting for a downlink control information (DCI) message. Then, the UE performs a GF UL transmission in accordance with the GF configuration information in the RRC signal.

公开(公告)号：US20190230691A1

公开(公告)日：2019-07-25

申请号：US16360774

申请日：2019-03-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yu Cao ,  Jianglei Ma ,  Liqing Zhang ,  Zhengwei Gong

IPC: H04W72/12 ,  H04L5/00 ,  H04L1/18

Abstract: Provided is a method in a user equipment, the method comprising: as part of a HARQ process having a HARQ process ID, transmitting an initial grant-free transmission and K-1 repetitions, where K>=2. A pre-defined mapping of the HARQ process ID to at least one resource available for grant-free transmission is a function of K.

公开(公告)号：US10333678B2

公开(公告)日：2019-06-25

申请号：US15160707

申请日：2016-05-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Jianglei Ma ,  Liqing Zhang ,  Jing Qiu

IPC: H04L5/00 ,  H04W72/12 ,  H04L5/14

Abstract: A time division duplex (TDD) scheduling interval communicating transmissions in a first direction may include one or more regions for communicating in a second direction, where the first direction is a transmit direction and the second direction is a receive direction, or vice versa. A radio frame may include TDD scheduling intervals with such regions and/or TDD scheduling intervals without such regions for wireless communication, and these TDD scheduling intervals may further be configured in accordance with different frame structure configurations, such as different scheduling interval lengths, subcarrier spacings or symbol durations.

公开(公告)号：US10271331B2

公开(公告)日：2019-04-23

申请号：US16108589

申请日：2018-08-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma ,  Keyvan Zarifi

IPC: H04W72/04 ,  H04W48/00 ,  H04L1/18 ,  H04L5/14 ,  H04W28/06 ,  H04W72/12

Abstract: In one embodiment, a method for adaptive transmission time intervals (TTIs) includes transmitting, by a communications controller to a user equipment (UE), a segment of a first TDD TTI configuration of a first TDD interval and a second TDD TTI configuration of the first TDD interval, where the first TDD TTI configuration has a first pattern, where the second TDD TTI configuration has a second pattern, where the first pattern is different than the second pattern, where the first TDD TTI configuration has a first uplink TTI segment and a first downlink TTI segment. The method also includes transmitting a first plurality of data on a first TTI in the first downlink TTI segment of the first TDD TTI configurations of the first TDD interval and receiving a second plurality of data on the first uplink segment of the first TDD TTI configuration of the first TDD interval.

公开(公告)号：US20190045448A1

公开(公告)日：2019-02-07

申请号：US16152673

申请日：2018-10-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma

IPC: H04W52/02 ,  H04W88/02

Abstract: A method for operating a user equipment (UE) includes determining a first operating state in accordance with a first message traffic generated by a non-session based application executing in the UE, setting a state machine in the UE to the first operating state, and transmitting a first message in accordance with the state machine.

公开(公告)号：US10200137B2

公开(公告)日：2019-02-05

申请号：US14582951

申请日：2014-12-24

Applicant: Huawei Technologies Co., LTD.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma

IPC: H04J3/16 ,  H04L5/00 ,  H04W72/00 ,  H04L5/22

Abstract: System and method embodiments are disclosed to provide mechanisms that allow adaptive transmission time interval (TTI) coexistence in Long Term Evolution (LTE) and fifth generation (5G) cellular systems. In accordance with an embodiment, a method for an adaptive TTI coexistence mechanism includes allocating, by a network controller, a LTE TTI at a first bandwidth. The first bandwidth is smaller than an available system bandwidth and is centered around a carrier frequency at a center of the available system bandwidth. The method further includes broadcasting the first bandwidth in LTE system information messages, allocating adaptive TTIs in the available system bandwidth outside the first bandwidth, and broadcasting adaptive TTI bandwidth partitioning information to adaptive TTI-capable terminals.

公开(公告)号：US10135562B2

公开(公告)日：2018-11-20

申请号：US14724569

申请日：2015-05-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Kelvin Kar Kin Au ,  Jianglei Ma

IPC: H04L1/00 ,  H04L5/00 ,  H04W74/08

Abstract: Embodiments are provided for a scheme of link adaptation (LA) in uplink grant-less random access (RA) communications. The scheme includes changing a modulation and coding (MCS) of a user, instead of using a fixed MCS over time, as the user link, channel, or non-link conditions vary during the RA communications. In an embodiment, a transmission point (TP) receives from a UE a packet encoded using a MCS, and detects a condition associated with uplink measurements or other non-link based condition of the UE. The TP then initiates an upgrade or a downgrade of the MCS in accordance with the condition, and signals the UE indicating a second MCS as a result. The UE thus sends a second packet encoded using the second MCS. In another embodiment, the UE initiates the MCS change in accordance to detecting a link or non-link based condition, such as change of mobility.